arch/powerpc/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_COMPAT_H
   3 #define _ASM_POWERPC_COMPAT_H
   4 #ifdef __KERNEL__
   5 /*
   6  * Architecture specific compatibility types
   7  */
   8 #include <linux/types.h>
   9 #include <linux/sched.h>
  10
  11 #define COMPAT_USER_HZ          100
  12 #ifdef __BIG_ENDIAN__
  13 #define COMPAT_UTS_MACHINE      "ppc\0\0"
  14 #else
  15 #define COMPAT_UTS_MACHINE      "ppcle\0\0"
  16 #endif
  17
  18 typedef u32             compat_size_t;
  19 typedef s32             compat_ssize_t;
  20 typedef s32             compat_time_t;
  21 typedef s32             compat_clock_t;
  22 typedef s32             compat_pid_t;
  23 typedef u32             __compat_uid_t;
  24 typedef u32             __compat_gid_t;
  25 typedef u32             __compat_uid32_t;
  26 typedef u32             __compat_gid32_t;
  27 typedef u32             compat_mode_t;
  28 typedef u32             compat_ino_t;
  29 typedef u32             compat_dev_t;
  30 typedef s32             compat_off_t;
  31 typedef s64             compat_loff_t;
  32 typedef s16             compat_nlink_t;
  33 typedef u16             compat_ipc_pid_t;
  34 typedef s32             compat_daddr_t;
  35 typedef u32             compat_caddr_t;
  36 typedef __kernel_fsid_t compat_fsid_t;
  37 typedef s32             compat_key_t;
  38 typedef s32             compat_timer_t;
  39
  40 typedef s32             compat_int_t;
  41 typedef s32             compat_long_t;
  42 typedef s64             compat_s64;
  43 typedef u32             compat_uint_t;
  44 typedef u32             compat_ulong_t;
  45 typedef u64             compat_u64;
  46 typedef u32             compat_uptr_t;
  47
  48 struct compat_timespec {
  49         compat_time_t   tv_sec;
  50         s32             tv_nsec;
  51 };
  52
  53 struct compat_timeval {
  54         compat_time_t   tv_sec;
  55         s32             tv_usec;
  56 };
  57
  58 struct compat_stat {
  59         compat_dev_t    st_dev;
  60         compat_ino_t    st_ino;
  61         compat_mode_t   st_mode;
  62         compat_nlink_t  st_nlink;
  63         __compat_uid32_t        st_uid;
  64         __compat_gid32_t        st_gid;
  65         compat_dev_t    st_rdev;
  66         compat_off_t    st_size;
  67         compat_off_t    st_blksize;
  68         compat_off_t    st_blocks;
  69         compat_time_t   st_atime;
  70         u32             st_atime_nsec;
  71         compat_time_t   st_mtime;
  72         u32             st_mtime_nsec;
  73         compat_time_t   st_ctime;
  74         u32             st_ctime_nsec;
  75         u32             __unused4[2];
  76 };
  77
  78 struct compat_flock {
  79         short           l_type;
  80         short           l_whence;
  81         compat_off_t    l_start;
  82         compat_off_t    l_len;
  83         compat_pid_t    l_pid;
  84 };
  85
  86 #define F_GETLK64       12      /*  using 'struct flock64' */
  87 #define F_SETLK64       13
  88 #define F_SETLKW64      14
  89
  90 struct compat_flock64 {
  91         short           l_type;
  92         short           l_whence;
  93         compat_loff_t   l_start;
  94         compat_loff_t   l_len;
  95         compat_pid_t    l_pid;
  96 };
  97
  98 struct compat_statfs {
  99         int             f_type;
 100         int             f_bsize;
 101         int             f_blocks;
 102         int             f_bfree;
 103         int             f_bavail;
 104         int             f_files;
 105         int             f_ffree;
 106         compat_fsid_t   f_fsid;
 107         int             f_namelen;      /* SunOS ignores this field. */
 108         int             f_frsize;
 109         int             f_flags;
 110         int             f_spare[4];
 111 };
 112
 113 #define COMPAT_RLIM_INFINITY            0xffffffff
 114
 115 typedef u32             compat_old_sigset_t;
 116
 117 #define _COMPAT_NSIG            64
 118 #define _COMPAT_NSIG_BPW        32
 119
 120 typedef u32             compat_sigset_word;
 121
 122 typedef union compat_sigval {
 123         compat_int_t    sival_int;
 124         compat_uptr_t   sival_ptr;
 125 } compat_sigval_t;
 126
 127 #define SI_PAD_SIZE32   (128/sizeof(int) - 3)
 128
 129 typedef struct compat_siginfo {
 130         int si_signo;
 131         int si_errno;
 132         int si_code;
 133
 134         union {
 135                 int _pad[SI_PAD_SIZE32];
 136
 137                 /* kill() */
 138                 struct {
 139                         compat_pid_t _pid;              /* sender's pid */
 140                         __compat_uid_t _uid;            /* sender's uid */
 141                 } _kill;
 142
 143                 /* POSIX.1b timers */
 144                 struct {
 145                         compat_timer_t _tid;            /* timer id */
 146                         int _overrun;                   /* overrun count */
 147                         compat_sigval_t _sigval;        /* same as below */
 148                         int _sys_private;       /* not to be passed to user */
 149                 } _timer;
 150
 151                 /* POSIX.1b signals */
 152                 struct {
 153                         compat_pid_t _pid;              /* sender's pid */
 154                         __compat_uid_t _uid;            /* sender's uid */
 155                         compat_sigval_t _sigval;
 156                 } _rt;
 157
 158                 /* SIGCHLD */
 159                 struct {
 160                         compat_pid_t _pid;              /* which child */
 161                         __compat_uid_t _uid;            /* sender's uid */
 162                         int _status;                    /* exit code */
 163                         compat_clock_t _utime;
 164                         compat_clock_t _stime;
 165                 } _sigchld;
 166
 167                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
 168                 struct {
 169                         unsigned int _addr; /* faulting insn/memory ref. */
 170                 } _sigfault;
 171
 172                 /* SIGPOLL */
 173                 struct {
 174                         int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
 175                         int _fd;
 176                 } _sigpoll;
 177
 178                 /* SIGSYS */
 179                 struct {
 180                         unsigned int _call_addr; /* calling insn */
 181                         int _syscall;            /* triggering system call number */
 182                         unsigned int _arch;      /* AUDIT_ARCH_* of syscall */
 183                 } _sigsys;
 184         } _sifields;
 185 } compat_siginfo_t;
 186
 187 #define COMPAT_OFF_T_MAX        0x7fffffff
 188 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 189
 190 /*
 191  * A pointer passed in from user mode. This should not
 192  * be used for syscall parameters, just declare them
 193  * as pointers because the syscall entry code will have
 194  * appropriately converted them already.
 195  */
 196
 197 static inline void __user *compat_ptr(compat_uptr_t uptr)
 198 {
 199         return (void __user *)(unsigned long)uptr;
 200 }
 201
 202 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 203 {
 204         return (u32)(unsigned long)uptr;
 205 }
 206
 207 static inline void __user *arch_compat_alloc_user_space(long len)
 208 {
 209         struct pt_regs *regs = current->thread.regs;
 210         unsigned long usp = regs->gpr[1];
 211
 212         /*
 213          * We can't access below the stack pointer in the 32bit ABI and
 214          * can access 288 bytes in the 64bit big-endian ABI,
 215          * or 512 bytes with the new ELFv2 little-endian ABI.
 216          */
 217         if (!is_32bit_task())
 218                 usp -= USER_REDZONE_SIZE;
 219
 220         return (void __user *) (usp - len);
 221 }
 222
 223 /*
 224  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 225  * it we may as well define it.
 226  */
 227 struct compat_ipc64_perm {
 228         compat_key_t key;
 229         __compat_uid_t uid;
 230         __compat_gid_t gid;
 231         __compat_uid_t cuid;
 232         __compat_gid_t cgid;
 233         compat_mode_t mode;
 234         unsigned int seq;
 235         unsigned int __pad2;
 236         unsigned long __unused1;        /* yes they really are 64bit pads */
 237         unsigned long __unused2;
 238 };
 239
 240 struct compat_semid64_ds {
 241         struct compat_ipc64_perm sem_perm;
 242         unsigned int __unused1;
 243         compat_time_t sem_otime;
 244         unsigned int __unused2;
 245         compat_time_t sem_ctime;
 246         compat_ulong_t sem_nsems;
 247         compat_ulong_t __unused3;
 248         compat_ulong_t __unused4;
 249 };
 250
 251 struct compat_msqid64_ds {
 252         struct compat_ipc64_perm msg_perm;
 253         unsigned int __unused1;
 254         compat_time_t msg_stime;
 255         unsigned int __unused2;
 256         compat_time_t msg_rtime;
 257         unsigned int __unused3;
 258         compat_time_t msg_ctime;
 259         compat_ulong_t msg_cbytes;
 260         compat_ulong_t msg_qnum;
 261         compat_ulong_t msg_qbytes;
 262         compat_pid_t msg_lspid;
 263         compat_pid_t msg_lrpid;
 264         compat_ulong_t __unused4;
 265         compat_ulong_t __unused5;
 266 };
 267
 268 struct compat_shmid64_ds {
 269         struct compat_ipc64_perm shm_perm;
 270         unsigned int __unused1;
 271         compat_time_t shm_atime;
 272         unsigned int __unused2;
 273         compat_time_t shm_dtime;
 274         unsigned int __unused3;
 275         compat_time_t shm_ctime;
 276         unsigned int __unused4;
 277         compat_size_t shm_segsz;
 278         compat_pid_t shm_cpid;
 279         compat_pid_t shm_lpid;
 280         compat_ulong_t shm_nattch;
 281         compat_ulong_t __unused5;
 282         compat_ulong_t __unused6;
 283 };
 284
 285 static inline int is_compat_task(void)
 286 {
 287         return is_32bit_task();
 288 }
 289
 290 #endif /* __KERNEL__ */
 291 #endif /* _ASM_POWERPC_COMPAT_H */